JPH0713890Y2 - Push pin mounting structure - Google Patents

Description

[Detailed Description of the Invention] (Industrial application field) The present invention relates to a mold, a molding die, and a push pin for ejecting a molded product such as a casting, a mold, and a molded product from a molding die. Regarding the mounting structure to the mold.

(Prior Art) Conventionally, as described in Japanese Utility Model Publication No. 63-44210, a push pin has been attached to an extruded plate by screwing or welding.

This push pin is heavily worn. In particular, the corners are severely worn, and the corners of the end face are rounded to form a gap with the mold.
Burrs are generated on the molded product molded in the gap portion, which burrs on the push pins and makes it difficult to release the molded product from the mold.

As a result, the molded product will be chipped. In addition, since the molded product will have excess thickness, it is necessary to take measures such as scraping the molded product later. Therefore, the push pin had to be replaced frequently.

(Problems to be solved by the invention) Since it takes time to replace the push pin, there is a problem to shorten the replacement time during the work of changing the mold in order to improve the production efficiency.

(Means for Solving the Problems) The present invention was devised to solve the above problems, and a pressing bar for removing a molded product from a mold is provided along with the pressing bar. Is a push pin mounting structure characterized in that the push pin is pressed into contact with and separated from the push pin by a set screw that can be propelled and retracted, and the push pin is mounted and fixed to and removed from the extrusion plate of the molding die.

(Operations and Examples) In the push pin mounting structure of the present invention, as shown in the exploded view of FIG. 1, the push bar (2) provided along the push pin (1) has the push plate (3). By pushing and retracting the set screw (5) screwed into the screw hole (4) of the push pin (1), the push pin (1) is pressed and separated from the push pin (1), and the push pin (6) is inserted into the groove (6) provided in the extruded plate (3). The push pin (1) can be pulled out by pressing 1) to fix it with frictional force or loosening it.

The structure of screwing the set screw (5) into the extruded plate (3) is
As shown in FIG. 1, the extrusion plate (3) is provided with a recessed portion,
In addition to the structure in which the set screw (5) is passed through the main body of the extrusion plate (3) toward the recessed portion (7), the extrusion plate (3) is attached to the extrusion plate (3) as shown in FIG. Is provided with another push pin (1) mounting portion (8), a screw hole (4) is bored there, and a set screw (5) screwed into this screw hole (4) is configured to be propulsive and retractable. Is also good.

Further, as shown in FIG. 3, a push-out plate (3) is provided with a protrusion (9) into which the push pin (1) is fitted, and the push bar (2) and this push-out part (9) are used to push the push pin (1). A swelling portion (10) for levering is provided at one end of the scissors and the pressing bar (2), and a protrusion (9) between the swelling portion (10) and a position sandwiching the push pin (1) is provided. A screw hole (4) is drilled, a set screw (5) screwed into the screw hole (4) is made to be propulsive and retractable, and the pressing bar (2) and the pushing plate (3) are tightened by the set screw (5). Alternatively, the push pin (1) may be clamped with a pinch.

If one of the concave portions (7) has a structure in which the lower bottom in FIG. 1, for example, is closed, it is easy to attach when the push pin (1) is attached.

(Effects of the Invention) The push pin mounting structure of the present invention allows the push bar to be detached by strongly pressing the push bar against the push pin or separating it by advancing and retracting the set screw. It can be easily attached to and detached from the extruded plate, can be easily replaced in a narrow space, and both ends of the push pin can be used, which saves materials and eliminates the burrs of the molded product so that the molded product can be removed. The present invention has the advantages that it is easy and there is no surplus of the molded product.

[Brief description of drawings]

FIG. 1 is an exploded view of parts in a state in which parts are disassembled and arranged and a part of the parts is broken according to an embodiment of the present invention, and FIGS. 2 and 3 are extruded plates and push pins of different embodiments, respectively. It is an explanatory view showing a mounting structure of. 1 …… Push pin; 2 …… Pressing bar; 3 …… Extrusion plate; 4 …… Screw hole; 5 …… Set screw; 6 …… Concave groove; 7 …… Concave part; 8 …… Mounting part; 9… … Protruding part; 10 …… Swelling part.

Claims (1)

[Scope of utility model registration request] 1. A push pin for taking out a molded product from a mold, a pressure bar provided along the push pin is pressed against and separated from the push pin by a propelling and retractable setscrew, and the push pin is connected to a molding die. Push pin mounting structure characterized by being attached and fixed to and removed from the extrusion plate.